There's a zone around my home turf that is accessed by about 2 km of biathlon track so I actually skate the split fairly regularly. It's not pretty, but once you get the hang of it, you can get a pretty decent clip going. My advice would be to do up your boots, max out the length of your poles and get low. Instead of trying to make long strides by putting a lot of energy into each kick, try to get a more fluid shortened stride going. It should feel kind of like you're waddling.